Blog

The security knowledge graph, a knowledge graph specific to the security domain, is the key to realizing cognitive intelligence in cyber security, and it also lays an indispensable technological foundation for dealing with advanced, continuous and complex threats and risks in cyberspace. NSFOCUS published a series of articles about the application of the security knowledge […]

Operation DarkCasino: In-Depth Analysis of Attacks by APT Group Evilnum (Part 1) Components Evilnum mainly used a new customized trojan in this operation. NSFOCUS Security Labs named it DarkMe based on the particular string in the trojan program. NSFOCUS Security Labs also discovered another new trojan program that had a close connection to this operation […]

Overview Recently, NSFOCUS Security Labs observed a series of phishing activities against European countries. Those activities mainly targeted online gambling platforms as well as active online trading behaviors, aiming to steal transaction credentials of service providers and customers for illegal profits. The in-depth analysis revealed that it was a continuation of recent attacks staged by […]

Introduction According to the H1 2022 NSFOCUS Global DDoS Attack Landscape report released on 6 Sept 2022, DDoS attacks made a surprising 205% increase compared with the first half of 2021. When it comes to the carpet-bombing attacks prevalent in recent years, more than 100,000 IP addresses on hundreds of network segments were hit by […]

Overview On September 14, NSFOCUS CERT detected that Microsoft released the September security update patch, which fixed 63 security issues, involving widely used products such as Windows TCP/IP, .NET Framework, Windows Print Spooler Components, and Windows LDAP. Including high-risk vulnerability types such as privilege escalation and remote code execution. Among the vulnerabilities fixed by Microsoft’s […]

1.  Background As early as 2016, a report from BitSight, an American cybersecurity ratings company, showed that Brazil is one of the riskiest countries to do business in. According to the cyber threat report released by SonicWALL, Brazil suffered more than 33 million intrusion attempts in 2021, and suffered ransomware attacks second only to the […]

Part 1: Investigation Report on New APT Organization MurenShark: Torpedoes Fired to Turkish Navy [1] Characteristics of Attack Tactics Use compromised sites: MurenShark tends to use compromised sites as the file server and the C&C server in the attack process. As shown in the last chapter, the organization used the Near East University site (Yakın […]

Overview In 2022 Q2, NSFOCUS Security Labs detected a series of cyberattacks against Turkey. After analysis, the researchers confirmed that this round of attacks originated from Actor210426, a new threat entity identified by NSFOCUS Security Labs in April 2021. Through the clues of behavior pattern, attack method, attack tool, attack target and so on, NSFOCUS […]

Overview Recently, NSFOCUS CERT found that Apache Hadoop officially fixed a command injection vulnerability. Since Apache Hadoop’s FileUtil.unTar API does not escape the input filename before passing it to the shell, an attacker could exploit this vulnerability to inject arbitrary commands and thus achieve remote code execution. Affected users are recommended to take steps to […]

Background Recently, the cyber threat actor known as UNC 1151 group was spotted to use the Browser in the Browser (BitB) technique in its campaigns. This technique is used for phishing attacks by displaying a new browser window containing a fake login panel on the visited website. The window is so carefully crafted that it […]